Enjoying amazing ancient structures through Internet technologies is one of the most promising methods to promote our culture and cultural heritage. These technologies involve sensing, transmission, and display. In this talk, I will briefly explain these three aspects, and then focus on sensing issues, in particular, the technical challenges presented by sensing huge outdoor structures. I will describe the technical challenges and how we solved them as we confronted the difficult task of modeling the huge Bayon Temple in the Angkor ruin in Cambodia. I will show the digital data we obtained, including the entire structure of the temple, the hundred and seventy-three faces of deities, and the hidden pediments. I will also explain some of the technical issues involved in displaying the data we obtained, using our virtual Aska as an example.